Although she showed some improvement Sunday, Whitney Houston’s daughter Bobbi Kristina has “significantly diminished” brain function and doctors have told her family her prognosis is still not good, TMZ reported Monday.

The 21-year-old was found face down in her bathtub and not breathing Saturday morning by her husband Nick Gordon at their home in Roswell, Georgia. Either police officers or paramedics — it is not clear which — revived her and she was transferred to an Atlanta-area hospital, where she remains in a medically induced coma. The website reports she’s breathing with the aid of a ventilator and tests have determined her brain function is alarmingly low, although TMZ said there signs of “minimal response” to some brain tests on Sunday.

Her father, singer Bobbi Brown, released a statement Monday morning, saying “Privacy is requested in this matter. Please allow for my family to deal with this matter and give my daughter the love and support she needs at this time.”

Hospital officials have declined to comment on Brown’s condition. Her father’s lawyer said no further information would be released, according to ABC News.

Gordon was performing CPR on Brown when Roswell police officers arrived at 10:25 a.m. and took over until medics arrived.

“Can’t say how sad this is,” Roswell Police Department spokeswoman Lisa Holland said, according to ABC. “It’s a difficult situation for police officer to perform CPR on any person.”

Police are still investigating the incident. Holland said they didn’t find any drugs in the house.

Houston died nearly three years ago in her bathtub at the Beverly Hilton Hotel, just before the Grammys.